Paul R. Posted May 19, 2023 Report Share Posted May 19, 2023 I currently have a LED box that I used to test continuity on a 28 pin circular connector. See attached photo. Pin 1 when probed (probe is attached to box) on the circular connector corresponds to LED 1, etc. I would like to make a digital display version of this. Any help appreciated on components needed, circuit examples, etc. Quote Link to comment Share on other sites More sharing options...
HarryA Posted May 19, 2023 Report Share Posted May 19, 2023 You could use an Arduino Mega 2560 as it has enough digital input/output pins for your 28 connections. Other micro-controllers may work but I only know the Arduino controllers. Do you need more than a simple one line display? "Yup pin 13 is okay" Quote Link to comment Share on other sites More sharing options...
Paul R. Posted May 23, 2023 Author Report Share Posted May 23, 2023 Thank you. The display just needs to display "1", "2", etc. My colleague was interested in one that had 63 inputs or more. He also mentioned a Raspberry Pi. Unfortunately, I'm not familiar with either the Arduino or Raspberry Pi units. Quote Link to comment Share on other sites More sharing options...
HarryA Posted May 24, 2023 Report Share Posted May 24, 2023 If it interest you, I could program the micro-controller for you. That would give you an introduction to micro-controllers. The micro-controller is about 21$, a LCD about 13$, You would need a 9 volt battery, a battery connector, a battery to micro_controller connector, and a switch also. An assortment of colored wire would be helpful. Plus a plastic or metal box to pack it all into. If you are checking your cables near a computer you could uses the computer as a simple display device instead of the LCD. LCD : https://www.amazon.com/SunFounder-Serial-Module-Arduino-Mega2560/dp/B01GPUMP9C/ref=sr_1_1_sspa?adgrpid=1335907194272933 Micro-controller: https://www.amazon.com/ELEGOO-ATmega2560-ATMEGA16U2-Arduino-Compliant/dp/B01H4ZDYCE/ref=sr_1_2_sspa?crid=1L06F0IP302BX&keywords=Arduino+R3+Mega2560&qid=1684882151 wire: https://www.amazon.com/TUOFENG-Hookup-Wires-6-Different-Colored/dp/B07TX6BX47/ref=sr_1_3?keywords=colored+wire+spool&link_code=qs&qid=1684885902&sourceid=Mozilla-search&sr=8-3 Quote Link to comment Share on other sites More sharing options...
Paul R. Posted May 24, 2023 Author Report Share Posted May 24, 2023 How much more would it cost for unit that has 63 or more inputs? Quote Link to comment Share on other sites More sharing options...
HarryA Posted May 26, 2023 Report Share Posted May 26, 2023 The Mega 2560 has 54 digital I/O pins plus 16 analog pins for a total of 70. You lose 2 pins for the display for either the PC display or LCD. You can have speech on the PC for free. You may need a larger LCD for numerous pins. Mapping the Mega pin numbers to the cable pin numbers would have to be predetermined. Some connectors use alpha characters (A - Z) I gather. Quote Link to comment Share on other sites More sharing options...
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